Home / 3,981.30-5,966.76-1,872.21

Finding the Fourth Proportional to 3,981.30, 5,966.76 and 1,872.21

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Solution

The fourth proportional to 3,981.30, 5,966.76 and 1,872.21 is: 2,805.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.30 : 5,966.76 = 1,872.21 : x
  2. Step 2: Convert to fraction form
    3,981.30/5,966.76 = 1,872.21/x
  3. Step 3: Cross multiply
    3,981.30x = 5,966.76 × 1,872.21
  4. Step 4: Simplify right side
    3,981.30x = 11,171,057.14
  5. Step 5: Solve for x
    x = 11,171,057.14/3,981.30
  6. Step 6: Final answer
    x = 2,805.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.